There is a buzz about keeping hives on rooftops these days. Several hotels in San Francisco are maintaining rooftop beehives for a couple of reasons. First, they’re using the honey produced for cocktails, food preparation and even as spa treatments. And second, doing so is part of an effort to combat colony collapse disorder.

CCD occurs when worker bees abandon the hive, leaving the queen behind. This has been occurring more and more, resulting in millions of beehives lost. This, in turn, has a negative impact on the world’s food sources.

The rooftop beehives aren’t found only among San Francisco hotels. Multifamily properties in Chicago and New York City also have urban beehives, as do office buildings across the country.